subset.apa_list

<p>Either a numeric or a character vector specifying the plots that
shall be selected.</p>

subset

<p>Select one or more APA-maps and related data from an <code>apa_list</code> object.</p>

Maps of the 'area potentially available' (APA) of trees is calculated from
mapped forest stands using the approach from Gspaltl et al. (2012) <doi:10.1093/forestry/cps052>.
This is done by computing a rasterized version of
'weighted voronoi diagrams' using a an approximation of the trees competitive
ability (e.g., crown radius, leaf area) as weight. The main output are 'Raster*'-
objects from the 'raster' package that are stored together with the raw data in
apa_list's, the main class of the 'APAtree' package. Aggregation functions are
provided to calculate stand characteristics based on APA-maps such as relative
proportions according to APA-size and the neighborhood diversity index NDiv
(Glatthorn (2021) <doi:10.1016/j.ecolind.2021.108073>).

Jonas Glatthorn

subset.apa_list: Subsetting of apa_lists

Description

Usage

Arguments